Filter



FIG. 1 is a side perspective view of a filter in an open state, showing my new design;

FIG. 2 is a top perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a top perspective view thereof, in a closed state.

The rear view being a mirror image of the front view is thus omitted. 

CLAIM The ornamental design for a filter, as shown and described. 